Yaphet_ly的博客

一.UIButton实例化 UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem]; /* 1.UIButtonTypeSystem           2.UIButtonTypeRoundedRect   圆角按钮, iOS7之前有效,iOS7之后无效果 和UIButtonTypeSystem效果一样 3.UIB

一.UILabel的实例化 UILabel *label = [[UILabel alloc] init];label.frame = CGRectMake(20,100,280,10); 通常为了避免frame的遗漏,这样实例化: UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20,100,280,10)];